Answer: The answer for this would be the rise over run. If you know what the rise over run expression is great. If not, here it is. The slope of a non-vertical line is the ratio of the amount it rises over some interval, over the length of that interval.
It is written like this rise/run.
Step-by-step explanation: Start from 8 and RISE (vertically) 4 places, the RUN (horizontally) and count until you get to -12. Then you take your numbers and divide.